/usr/share/doc/avrdude/README.Debian

AVRDUDE for Debian
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If you have a chip that is not directly supported by avrdude you can add it
to the configuration file /etc/avrdude.conf. For more information please take
a look at section 4 of the avrdude documentation.
-- Michael Biebl <biebl@teco.edu>, Mon, 6 Jun 2005 20:28:53 +0200